The Eagle helicopter has also been searching for Cooper over the past two days.

Cooper has been described as a European male of thin build and around 178m tall. At the time of his disappearance he was wearing a navy blue button up collared shirt with short sleeves, blue jeans, a faded blue sun hat, sneakers. He may also have a black sweatshirt on him.

Police are asking anyone who may have seen Cooper or who has information about where he is to contact North Shore Police on (09) 477 5000 or to contact Crimestoppers anonymously on 0800 555 111.